Exchange 2016: IMAP4 not working (user and mailbox are in a different site)

Azy1412 211 Reputation points
2021-03-16T13:20:29.677+00:00

IMAP4 on Exchange server not working. When we telnet to port:993 we get a black screen (screenshot)78286-telnet-blackscreen.png

the test the IMAP settings output:

[PS] C:\Windows\system32>Test-ImapConnectivity -ClientAccessServer EX01 -MailboxCredential (Get-Credential domain\user) |fl Port,connectionType,Result,Error

Port : 0
ConnectionType : Plaintext
Result : Failure
Error : Unable to create MailboxSession object to access the mailbox [email address]. 

             Detailed error information:  
             [Microsoft.Exchange.Data.Storage.WrongServerException]: The user and the mailbox are in different  
             Active Directory sites. Inner error [Microsoft.Mapi.MapiExceptionMailboxInTransit]:  
             MapiExceptionMailboxInTransit: Detected site violation (hr=0x0, ec=1292)

We've modified the IMAP4 config file: Microsoft.Exchange.Imap4.exe.config
to allow cross site authentication, the restarted the service but it didn't resolve the issue.

IMAP4 component shows health
[PS] C:\Windows\system32>Get-ServerHealth EX01 | ?{$_.HealthSetName -like "IMAP*"}

Server State Name TargetResource HealthSetName AlertValue ServerComp
onent
------ ----- ---- -------------- ------------- ---------- ----------
EX01 NotApplicable ImapCTPMonitor MSExchangeImap4 IMAP Healthy None
EX01 NotApplicable ProcessProcessorT... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable ImapSelfTestMonitor MSExchangeImap4BE IMAP.Protocol Healthy None
EX01 NotApplicable ImapDeepTestMonitor MSExchangeImap4BE IMAP.Protocol Healthy None
EX01 NotApplicable PrivateWorkingSet... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable ProcessProcessorT... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable CrashEvent.M.exch... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable PrivateWorkingSet... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable ProcessProcessorT... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable ProcessProcessorT... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable CrashEvent.M.exch... microsoft.exchang... IMAP.Protocol Healthy None
EX01 Online ImapProxyTestMonitor MSExchangeImap4 IMAP.Proxy Healthy ImapProxy
EX01 NotApplicable PrivateWorkingSet... microsoft.exchang... IMAP.Protocol Healthy None
EX01 NotApplicable PrivateWorkingSet... microsoft.exchang... IMAP.Protocol Healthy None

Event Logs show the following warning:

The Test-CasConnectivity cmdlet failed. Find the entry in TransientErrorCache. BaseUrl: . MbxServre: EX01.contoso.local. Error: Target: EX01.contoso.local|HQ

Error: Unable to create MailboxSession object to access the mailbox [email address].

Detailed error information:
[Microsoft.Exchange.Data.Storage.WrongServerException]: The user and the mailbox are in different Active Directory sites. Inner error [Microsoft.Mapi.MapiExceptionMailboxInTransit]: MapiExceptionMailboxInTransit: Detected site violation (hr=0x0, ec=1292)

Details:

Client Access Server Name: EX01.contoso.local
Scenario: Create a MailboxSession object.
Scenario Description: Creating MailboxSession object to access the mailbox [email address].
User Name: user
Performance Counter Name:
Result: Failure
Site: HQ
Latency: -00:00:00.0010000
Secure Access: True
ConnectionType: Plaintext
Port: 0
Latency (ms): -1
Virtual Directory Name:
URL: null
URL Type: Unknown
Error:
Unable to create MailboxSession object to access the mailbox [user].

Detailed error information:
[Microsoft.Exchange.Data.Storage.WrongServerException]: The user and the mailbox are in different Active Directory sites. Inner error [Microsoft.Mapi.MapiExceptionMailboxInTransit]: MapiExceptionMailboxInTransit: Detected site violation (hr=0x0, ec=1292)

-------------------------------------

. Warning: .

Thank you for your continuous support!

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Eric Yin-MSFT 4,386 Reputation points
    2021-03-17T08:38:26.027+00:00

    Hi,
    1 Check the IMAP services, make sure all IMAP services are running on all servers. We can also try to restart these services and check if any helps. (There are two services : Microsoft Exchange IMAP4 & Microsoft Exchange IMAP4 Backend )
    2 Check the certificate, make sure it had been assigned to IMAP service. If you are using a 3rd party cert, you can try to switch to self-certificate as a test and check again.
    3 Would you try specify the mailbox server that the test mailbox belongs to with "-MailboxServer name" ?
    4 Run below command to turn on IMAP protocol logging to help resolve issue:
    a. Enable logging: Set-ImapSettings -server <CAS server name> -ProtocolLoggingEnabled $true
    b. Get the location of log file and mailbox server: Get-ImapSettings -server <CAS server name>
    5 Do you have a LB?
    You can have another test in EXRCA: https://testconnectivity.microsoft.com/tests/Imap/input

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